氨基羟基脲脉冲辐解研究

Electron Beam Pulse Radiolysis of Hydroxysemicarbazide

摘要: 研究了脉冲辐解过程中氨基羟基脲与水辐解活性粒子（e^-_aq、·OH和·H）及单电子氧化剂·CO₃^-的反应动力学过程。反应近似为准一级反应，反应速率常数分别为k（e^-aq）=1.41×10⁸L/(mol·s)、k（·OH）=1.05×10¹⁰ L/(mol·s)、k（·H）=2.68×10⁵ L/(mol·s)、k（·CO^-₃）=4.25×10⁸ L/(mol·s)。其中氨基羟基脲与·OH的反应速率常数最大，故在辐解过程中其为主要反应。

Abstract: The kinetics of reactions between hydroxysemicarbazide(HSC) with water-radioactive particles (e^-_aq, ·OH and ·H) as well as singleelectron oxidant ·CO^-₃during pulse radiolysis were studied. The reactions are approximately quasi-first-order reactions, and the reaction rate constants are k（e-aq）=1.41×10⁸ L/(mol·s), k（·OH）=1.05×1010 L/(mol·s), k（·H）=2.68×10⁵ L/(mol·s), k（·CO^-₃）=4.25×10⁸ L/(mol·s), respectively. Among them, the reaction rate constant of HSC and ·OH is the largest, so the reaction of HSC and ·OH is the main reaction during the pulse radiolysis process.